[Icom] icom 756 pro II

Fri, 18 Jul 2003 10:17:56 -0700

Bons Dias Atilano,

You can download the IC-756Pro2 service manual here:

http://www.qsl.net/icom/manuals.html

Get IC-756Pro2 Documents (caution: it is a 36MB file!)

Here is the procedure you requested (Service Manual, p. 4-4):

IDLING CURRENT(1. for driver)
� Display frequency: 14.100000 MHz
� Mode : CW (key up)
� Preset R11, R18 on the PA unit to max. CCW.
� [RF POWER] : Max. CW
� [TUNER] : OFF
� Transmitting (without key)

On PA Unit: Unsolder W29. Connect an ammeter to the unsoldering points of
W29. Set R11 on PA Unit for 100 mA. After adjustment, re-solder the lead
wire (W29) on the PA board.

(2. for final amplifier)
2
� Transmitting (without key)

Unsolder R28 on PA Unit (L8 side). Connect an ammeter to the unsoldering
points of R28.
Set R18 on PA Unit for 500 mA. After adjustment, re-solder the resistor
(R28) on the PA board.

Hope this helps you.
Best 73,
Adam, VA7OJ/AB4OJ
North Vancouver, BC, Canada
http://www.qsl.net/ab4oj/
Icom FAQ site:
http://www.qsl.net/icom/

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of PY5EG
Sent: Friday, July 18, 2003 09:32
To: '[email protected]'
Subject: [Icom] icom 756 pro II

Hi Friends,
I have just replaced the two driver transistors in the ICOM 756PROII I do
not however have information as to the amount of standing current which must
be adjusted by the driver bias potentiometer,the operators manual is non
technical and does not publish this type of information.Would you kindly try
to find out the value of no signal driver standing current to be set by the
bias potentiometer,as there are two driver transistors the value should be
for both of them.
73--Oms PY5EG

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